US1777504A

US1777504A - Conduit pull box

Info

Publication number: US1777504A
Application number: US72182A
Authority: US
Inventors: Howard A Selah
Original assignee: Erie Malleable Iron Co
Current assignee: Erie Malleable Iron Co
Priority date: 1925-11-30
Filing date: 1925-11-30
Publication date: 1930-10-07
Anticipated expiration: 1947-10-07

Description

Oct. 7, 1930;

H. A. SELAH CONDUI T PULL BOX Filed Nov. 50, 1925 If f. ATTORNEYS.

Patented Oct. 7, 1930 uirao STATES PATENT OFFICE HOWARD A. SELAI-I, OF ERIE, PENNSYLVANIA, ASSIGNOB ERIE MALLEABLE IRON COMPANY, OF ERIE, PENNSYLVANIA, A. GORIORATION OF PENNSYLVANIA.

connur'r PULL 1392! Application filed November 30,1925. Serial 'No. 72,182,."

This invention is designed to improve condult pull boxes. With such boxes, especially those carrying in a number of wires it is often difficult to properly lead the wires from the box in a convenient manner and diflicult to arrange them in the box. With the present invention I leave the adjacent sides of the box open. This permits of putting the cover plates having'the lead openings in place and still having access to the box in arranging the wires in the box so as to properly run through to the openings.

Where large numbers of wires are used elongated boxes are used and it has been the practice to provide such boxes with single elongated covers. This has made it necessary, in most instances, to form a special cover for each installation. In the present invention covers are made in interchangeable sections. In this way the covers with the lead openings can be arranged at the ends, or center as desired and the interchangeable sections can be formed in standard units having a greater, or less number of openings. In this way the operator can choose such cover units and arrange them on the box so as to give just the proper leads and thus with a few standard units a great number of combinations on the double cover is made possible. Here again the adjacent open sides are desirable and it is desirable to cover both the openings with the sectional plates so that if desired lead openings may be carried from both the sides and at such parts of the sides as may be desirable. thus giving great flexibility. Features and details of the invention will appear from the specification and claims.

The invention is illustrated in the accompanying drawings as follows Fig. 1 shows a perspective view of a single section box, parts being in section to show construction Fig. 2 a side elevation of an elongated box with plural cover sections Fig. 3 a plan view of the structure shown in Fig. 2.

1 marks the box body. This has the closed sides 2 and 3 with a conduit chamber 4 and the open sides 2 and 3 Conduit extensions have

openings

5 and 6 in which conduits 7 and 8 extend. These are clamped by meansof the nuts 9. 1

Screw threadedopening s 10 are arranged. in the walls of the body usually in small projecting corner cats 10*. A corner rib 11 forms a portion of the body and is arranged along thecorner between the adjacent openingsQ and 3. This ribis connected with one of the side walls byposts 12, thus forming corners in which ears l0 may be provided for securing the cover plates. The posts are preferably coincident with the joints between the cover plate sections.

Cover plates 13 having lead openings 14 aresecured to the body by means of'screws 10 which extend through the covers into the screw-threaded openings 10. Ear sIO" project from the sides of the rib 11 in the open top, or top free from the posts 12 for receiving the screws 10. 'Blank plates 15 cover such sections of the openings as are not desired to bepi'ovided with lead openings 14. These plates maybe ordinary metal cover plates.

It will be noted that the cover sections,

as 13 and 15 are interchangeable and that cover sections 13 having the openings 14 may be placed where desired, either on both openings, or on different sections of the same opening as will make the lead openings most con.- venient in arrangingthe conductors. In this way a very simple yet very flexible structure is provided and one in which the operator may very readily arrange the wires, get them into the proper leads, and easily close the box.

What I claim as new is 1. In a conduit pull box, the combination of an elongated body having a conduit opening and a continuous opening extending throughout the side; and a plurality of interchangeable abutting cover sections covering the open side detachably secured on the outer face of the body, some of the sections having lead openings therethrough.

2. In a conduit pull box, the combination of an elongated body having a conduit opening and two adjacent open sides, the opening in one of the sides being continuous and extending throughout the length of the body; a corner rib between the open sides;

and covers for the open sides secured on the outer faces of the body and rib, there being a plurality of detachable sections on one of the open sides, some of said sections havin lead openings therethrough.

3. 1 h a conduit pull box, the combination of an elongated body having a conduit opening and two adjacent open sides, the opening. in one of the sides being continuous and extending throughout the length of the body;

a corner rib between the open sides; and

covers for the open sides secured on the outer faces of the body and rib there being a plurality of detachable sections on each of the open sides, some of said sections having lead openings therethrough.

4. In a conduit pull box, the combination of an elongated body having a conduit opening and two adjacent open sides, the opening in one of the sides being continuous and extending throughout the length of the body; a corner rib between the open sides; a post connecting the rib with an opposing wall of the body; and covers for the open sides secured on the outer faces of the body and rib, there being'a plurality of detachable sections on one of the open sides, some of said sections having lead openings therethrough.

' 5. In a conduit pull box, the combination of an elongated body having a conduit opening and two adjacent open sides, the opening in one of the sides being continuous and extending throughout the length of the body; a corner rib between the open sides; a post connecting the rib with an opposing wall of the body; covers for the open sides secured to the outer face of the body and rib there being a plurality of detachable sections on the open side having the posts; and joints between the sections registering with the posts, some of the sections having lead openings therethrough.

In testimony whereof I have hereunto set my hand. I

HOWARD A. SELAH.